Ore-roasting furnace



(No Model.) 7

L. D. GODSHALL.

ORE ROASTING FURNACE.

No. 598,084] I Patented Feb. 1, 1898.

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UNITED STATES PATENT EEicE,

LINCOLN D. GODSHALL, OF EVERETT, YVASI-IINGTON.

ORE-ROASTING FURNACE.

SPECIFICATION forming part of Letters Patent No. 598,084, dated February 1, 1898. Applicatio m October 27,1897. strains 656,563. unmade.)

To 5055 whom it may concern:

Be it known that I, LINCOLN D. GODSHALL, a citizen of the United States, residing at Everett, in the county of Snohomish and State of \Vashington, have invented a new and useful Ore-Roasting Furnace, of which the following is a specification.

This invention relates to calcining and oreroasting furnaces which are provided with slots or housings for protecting the carriages and adjunctive parts of the stirrers from the heat and fumes. In this class of furnaces the slots or housings are so formed as to admit of the arms of the stirrer-s or rakes moving freely when stirring or advancing the ore over the hearth. By attaching the upper walls forming the slot to the roof or arch the latter, in the ordinary course of wearand tear, frequently settles, thereby closing the slots through which the arms of the rakes or stirrers operate and crippling the stirring or agitating mechanism.

It is the purpose of the present invention to attach the upper walls forming the slot to the side walls of the furnace, which are immovable, heavy, and therefore better adapted for supporting their weight. Under this arrangement any settling or spreading of the arch will not have any efiect on the utility of the slot.

The improvement will be described at length hereinafter and particularly claimed, and is illustrated in the accompanying drawing, which is a transverse section of a furnace of ordinary construction, showing the application of the invention.

The side walls 1, roof or arch 2, hearth 3, and stirrers or agitators 4 are of common construction and are shown to illustrate the application of the invention, which latter consists in the special means resorted to for providing the upper walls of the side slots or housings and attaching them to the side walls of the furnace. Vertical walls 5 extend parallel with the side walls 1 and are located a short distance therefrom and are supported upon the hearth 3, and these walls may be of fire -brick or other refractory material. Brackets are bolted to the side walls 1 of the furnace, and consist of vertical members 6' the arms of the rakes orstirrers at. The parts 7 and 9 constitute the upper walls, which, being inwardly and downwardly inclined from the walls 1, prevent the lodgment thereon of ore or other matter. The refractory material 9 protects the part 7 from the heat and fumes, which is essential, as the bracket is preferably constructed of iron, either cast or wrought. The spaces inclosed by the upper and lower walls constitute the slots or housings, which receive the carriages of the rakes or stirrers and the parts cooperating therewith, so as to protect them from the action of the heat and fumes. The carriages travel upon rails 10, placed upon the hearth and located within the slots or side housings.

Having thus described the invention, what is claimed as new is- 1. In a furnace for calcining or roasting ores and provided with slots or housings for inclosing the carriages and adjunctive parts of the stirrers, the combination of lower walls rising from the hearth and extending parallel with the side walls of the furnace, and upper walls secured to the side walls of the furnace and extending inwardly and downwardly and terminating a short distance from the said vertical walls, substantially as and for the purpose set forth.

2. In a calcining or roasting furnace, the combination of vertical walls placed upon the hearth a shortdistance from the side walls, and brackets secured to the side walls of the furnace and having inwardly and downwardly inclined members or portions which terminate ashort distance above the top edges of the vertical walls, substantially as and for the purpose specified.

3. In a calcining or roasting furnace, the combination of lower walls placed upon the hearth a short distance from the side Walls, brackets secured to the said side walls and having inwardly and downwardly inclined members terminating in upwardly-extending ledges, and refractory material placed upon the said inclined portions of the brackets, substantially as and for the purpose described.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two Witnesses.

LINCOLN D. GODSl-IALL.

Witnesses:

E. L. BAILY, B. C. STANNARD. 

